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  Rumor 1: Orthodontic treatment should be done as early as possible, and the earlier the correction, the better the result. ✔/✗: Partially correct, partially incorrect. Orthodontic treatment should indeed be initiated early, but not necessarily as soon as possible. The period from 7 to 12 years old is a crucial stage for early intervention, during which the growth potential of teeth and jaws can be fully utilized to correct dental and jaw malformations. Therefore, all children should undergo an initial consultation with an orthodontist at age 7 to check for dental anomalies such as impacted teeth, supernumerary teeth, and congenitally missing teeth. For certain specific malformations, such as skeletal Class III malocclusion (anterior crossbite) and mesio-inclined lingual occlusion, orthodontic treatment may begin as early as age 5. However, in clinical practice, it is often observed that some 2-year-olds undergo orthodontic treatment, which falls into the category...

  Rumor 1: There are many complications associated with orthodontic treatment, so it should be avoided if possible. ✔/✗: Incorrect statement. In reality, the sequelae associated with orthodontic treatment are far fewer than people often perceive. When appropriate appliances and forces are utilized for correction, and patients comply well with treatment, these supposed sequelae can be completely avoided. In the case of adult orthodontic treatment, there are indeed some special considerations. For instance, adult patients may already have periodontal disease or gingival recession, and in cases of malalignment, there may be insufficient bony support between teeth, which can lead to the emergence of "black triangle" spaces after correction. This phenomenon is relatively common in adult orthodontic treatment, but it is not a direct consequence of the treatment itself; rather, it is a natural occurrence during the improvement of tooth alignment. To minimize the oc...

  Rumor 1: This is a new virus just like the SARS-CoV-2 (the virus that causes COVID-19) ! /✗: Not a New Virus, Discovered and Named Over Two Decades Ago More than 22 years ago, a virus team in the Netherlands published a paper stating that they had isolated a virus with clinical symptoms similar to those of human respiratory syncytial virus infection, and named it human metapneumovirus (hMPV). The article mentioned that serological studies indicated that almost all Dutch children had been exposed to hMPV before age 5, and that the virus had been circulating in humans for at least 50 years. Therefore, there is no need for people to be misled by clickbait headlines and panic, mistaking hMPV as a new virus. Rumor 2: The mortality rate of this virus infection is 43% after 100 days. /✗: The concept has been misrepresented; the mortality rate is not 43%! The widely circulated data online claiming a "43% mortality rate 100 days after infection" has been s...

  Rumor 1 :Directly dripping orange juice into the antigen test kit will result in a positive test outcome. /✗: Yes, indeed it is. The reason why directly dripping orange juice into the antigen test kit will result in a positive test outcome is due to the acidity of the orange juice. When orange juice is introduced into the antigen test strip, it disrupts the suitable pH environment, causing colloidal gold particles to aggregate and antigen-antibody non-specific binding to occur. These precipitated colloidal gold particles deposit in the T-zone, leading to a false positive result. Rumor 2 :Taking an orange before conducting a COVID-19 antigen self-test will cause the test result to show positive. /✗: This is a rumor. During antigen testing, the sampling site for nasal swabs is located within the nasal cavity, and consumption of certain foods will not affect the test results.

  1.Wearing a medical mask with knots tied improves its sealing performance Following the method demonstrated in the video, the sealing performance of a common surgical mask can indeed be improved, preventing viruses from reaching the respiratory tract through gaps on both sides. Before conducting science popularization and promotion, the US CDC publicly released relevant experimental reports around February 2021. The report indicated that tying knots and then wearing the mask can enhance filtration efficiency. 2.Knots don't turn it into an N95; there are significant differences in all aspects. The differences between the medical surgical masks we usually use and N95 masks manifest in many ways: In terms of filtration efficiency: N95 masks are one of the nine particulate respirators certified by the National Institute for Occupational Safety and Health (NIOSH). The "N" stands for "not resistant to oil," and "95" indicates that the filtration effic...

 Food additives are artificial or natural substances added to food to improve its color, aroma, and taste, as well as to meet the needs of preservation, freshness retention, and processing techniques. In fact, whether to add food additives is determined by the nature of the food and the production process. For foods with high protein content, a certain amount of preservatives must be added to ensure food quality and safety; otherwise, they are prone to spoilage. This is a complex issue, where an additive that is non-toxic in food A may be strictly prohibited in food B. Therefore, the safety of food cannot be solely judged by whether it contains food additives. The safe use of food additives, with compliant types and appropriate quantities, can guarantee food safety. In contrast, foods without food additives have a shorter shelf life and are highly susceptible to spoilage. We should clarify the relationship between food additives and food safety and not be blindly d...

  Rumor 1 :Suddenly jerking during sleep may indicate a risk of sudden death. /✗: This is a wrong statement This is not a sign of "sudden death." This phenomenon is called "hypnic jerk," also known as "sleep start" or "sleep myoclonus." Hypnic jerk poses no threat to life but can interfere with our sleep and affect sleep quality. To improve sleep quality when experiencing hypnic jerk, here are some suggestions: Learn to relax and relieve stress. Exercise appropriately and avoid electronic devices before bedtime. Drink more lukewarm water and reduce consumption of stimulating beverages such as coffee and strong tea. Increase calcium intake. Soak your feet and give yourself a foot massage before bedtime. In summary, experiencing a "sudden jerk while sleeping" is a normal physiological phenomenon in life, and there is no need for excessive concern. Rumor 2 :Long-term consumption of milk may incre...